Check the listing for details. 100 Pcs. Of Super Strong N52 Rare Earth Round Neodymium Magnets 3/16 X 3/16. Condition: New. Listed at 20.00 USD. These super strong round neodymium magnets have a nickel coating for durability. They have a grade of N52 and are available in 3/16” x 3/16” size. These rare earth magnets are perfect for various industrial and DIY projects that require strong magnetism. They come in a silver color and are disc-shaped. The magnets are manufactured in China and are sold in new condition.These super strong round neodymium magnets have a nickel coating for durability. They have a grade of N52 and are available in 3/16” x 3/16” size. These rare earth magnets are perfect for various industrial and DIY projects that require strong magnetism. They come in a silver color and are disc-shaped. The magnets are manufactured in China and are sold in new condition.